invalid byte range in PKCS#1 signature

Hello, this is my first post in this forum and I am thank you in advance for your help.

I am developing a component to sign PDF. I am getting invalid byte range error for the signed PDF document from my code. I am look through the byte range value and compare with other working signed PDF sample. I cant find what going wrong. Please help me.
The original file: http://www.marchrain.com/orig.pdf
The signed file : http://www.marchrain.com/signed.pdf

Thanks,